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authorJoe Thornber <ejt@redhat.com>2012-07-27 15:08:12 +0100
committerAlasdair G Kergon <agk@redhat.com>2012-07-27 15:08:12 +0100
commite4d2205cdf2094eb9f7246a4474f8df63806c1d3 (patch)
treeb7e202a32d0ae8ee19d55dc895d3009345addd3e /drivers/md/dm-thin-metadata.c
parentd6332814e343c76097ff10ed8225069e6392022f (diff)
downloadlinaro-lsk-e4d2205cdf2094eb9f7246a4474f8df63806c1d3.tar.gz
dm thin metadata: split __open or format metadata
Split __open_or_format_metadata into __format_metadata and __open_metadata in dm-thin-metadata. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-thin-metadata.c')
-rw-r--r--drivers/md/dm-thin-metadata.c124
1 files changed, 74 insertions, 50 deletions
diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index dceec441ef3..31d21bfc8cb 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -485,57 +485,22 @@ bad_locked:
return r;
}
-static int __open_or_format_metadata(struct dm_pool_metadata *pmd,
- dm_block_t nr_blocks, int create)
+static int __format_metadata(struct dm_pool_metadata *pmd, dm_block_t nr_blocks)
{
int r;
- struct dm_block *sblock;
- if (create) {
- r = dm_tm_create_with_sm(pmd->bm, THIN_SUPERBLOCK_LOCATION,
- &pmd->tm, &pmd->metadata_sm);
- if (r < 0) {
- DMERR("tm_create_with_sm failed");
- return r;
- }
-
- pmd->data_sm = dm_sm_disk_create(pmd->tm, nr_blocks);
- if (IS_ERR(pmd->data_sm)) {
- DMERR("sm_disk_create failed");
- r = PTR_ERR(pmd->data_sm);
- goto bad;
- }
- } else {
- struct thin_disk_superblock *disk_super;
-
- r = dm_bm_read_lock(pmd->bm, THIN_SUPERBLOCK_LOCATION,
- &sb_validator, &sblock);
- if (r < 0) {
- DMERR("couldn't read superblock");
- return r;
- }
-
- disk_super = dm_block_data(sblock);
- r = dm_tm_open_with_sm(pmd->bm, THIN_SUPERBLOCK_LOCATION,
- disk_super->metadata_space_map_root,
- sizeof(disk_super->metadata_space_map_root),
- &pmd->tm, &pmd->metadata_sm);
- if (r < 0) {
- DMERR("tm_open_with_sm failed");
- dm_bm_unlock(sblock);
- return r;
- }
-
- pmd->data_sm = dm_sm_disk_open(pmd->tm, disk_super->data_space_map_root,
- sizeof(disk_super->data_space_map_root));
- if (IS_ERR(pmd->data_sm)) {
- DMERR("sm_disk_open failed");
- dm_bm_unlock(sblock);
- r = PTR_ERR(pmd->data_sm);
- goto bad;
- }
+ r = dm_tm_create_with_sm(pmd->bm, THIN_SUPERBLOCK_LOCATION,
+ &pmd->tm, &pmd->metadata_sm);
+ if (r < 0) {
+ DMERR("tm_create_with_sm failed");
+ return r;
+ }
- dm_bm_unlock(sblock);
+ pmd->data_sm = dm_sm_disk_create(pmd->tm, nr_blocks);
+ if (IS_ERR(pmd->data_sm)) {
+ DMERR("sm_disk_create failed");
+ r = PTR_ERR(pmd->data_sm);
+ goto bad;
}
pmd->nb_tm = dm_tm_create_non_blocking_clone(pmd->tm);
@@ -552,9 +517,6 @@ static int __open_or_format_metadata(struct dm_pool_metadata *pmd,
pmd->trans_id = 0;
pmd->flags = 0;
- if (!create)
- return 0;
-
r = dm_btree_empty(&pmd->info, &pmd->root);
if (r < 0)
goto bad_data_sm;
@@ -580,6 +542,68 @@ bad:
return r;
}
+static int __open_metadata(struct dm_pool_metadata *pmd)
+{
+ int r;
+ struct dm_block *sblock;
+ struct thin_disk_superblock *disk_super;
+
+ r = dm_bm_read_lock(pmd->bm, THIN_SUPERBLOCK_LOCATION,
+ &sb_validator, &sblock);
+ if (r < 0) {
+ DMERR("couldn't read superblock");
+ return r;
+ }
+
+ disk_super = dm_block_data(sblock);
+ r = dm_tm_open_with_sm(pmd->bm, THIN_SUPERBLOCK_LOCATION,
+ disk_super->metadata_space_map_root,
+ sizeof(disk_super->metadata_space_map_root),
+ &pmd->tm, &pmd->metadata_sm);
+ if (r < 0) {
+ DMERR("tm_open_with_sm failed");
+ dm_bm_unlock(sblock);
+ return r;
+ }
+
+ pmd->data_sm = dm_sm_disk_open(pmd->tm, disk_super->data_space_map_root,
+ sizeof(disk_super->data_space_map_root));
+ if (IS_ERR(pmd->data_sm)) {
+ DMERR("sm_disk_open failed");
+ dm_bm_unlock(sblock);
+ r = PTR_ERR(pmd->data_sm);
+ goto bad;
+ }
+
+ dm_bm_unlock(sblock);
+
+ pmd->nb_tm = dm_tm_create_non_blocking_clone(pmd->tm);
+ if (!pmd->nb_tm) {
+ DMERR("could not create clone tm");
+ r = -ENOMEM;
+ goto bad_data_sm;
+ }
+
+ __setup_btree_details(pmd);
+
+bad_data_sm:
+ dm_sm_destroy(pmd->data_sm);
+bad:
+ dm_tm_destroy(pmd->tm);
+ dm_sm_destroy(pmd->metadata_sm);
+
+ return r;
+}
+
+static int __open_or_format_metadata(struct dm_pool_metadata *pmd,
+ dm_block_t nr_blocks, int create)
+{
+ if (create)
+ return __format_metadata(pmd, nr_blocks);
+ else
+ return __open_metadata(pmd);
+}
+
static int __create_persistent_data_objects(struct dm_pool_metadata *pmd,
dm_block_t nr_blocks, int *create)
{